CVE-2025-39911

Kernel warning via mismatched IRQ cleanup identifier

Published Oct 1, 2025 · Updated Jun 11, 2026

Resource-management flaw in the Linux i40e driver allows local users with elevated privileges to trigger an IRQ warning. In i40e_vsi_request_irq_msix(), a later request_irq() failure sends free_irq() a dev_id different from the one used for registration, so requested IRQs remain allocated while cleanup targets the wrong entry. Reaching the error path requires CAP_NET_ADMIN in the initial namespace and a physical i40e NIC; the documented result is a kernel warning during interface activation.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-management flaw in the Linux i40e driver allows local users with elevated privileges to trigger an IRQ warning. In i40e_vsi_request_irq_msix(), a later request_irq() failure sends free_irq() a dev_id different from the one used for registration, so requested IRQs remain allocated while cleanup targets the wrong entry. Reaching the error path requires CAP_NET_ADMIN in the initial namespace and a physical i40e NIC; the documented result is a kernel warning during interface activation.

The record

CVE
CVE-2025-39911
Published
Oct 1, 2025
Updated
Jun 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.13
  2. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <13ab9adef3cd386511c930a9660ae06595007f89
  3. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <23431998a37764c464737b855c71a81d50992e98
  4. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <6e4016c0dca53afc71e3b99e24252b63417395df
  5. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <915470e1b44e71d1dd07ee067276f003c3521ee3
  6. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <a30afd6617c30aaa338d1dbcb1e34e7a1890085c
  7. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <b905b2acb3a0bbb08ad9be9984d8cdabdf827315
  8. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <b9721a023df38cf44a88f2739b4cf51efd051f85
  9. Affected versionversion=493fb30011b3ab5173cef96f1d1ce126da051792 <c62580674ce5feb1be4f90b5873ff3ce50e0a1db

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.13; version=493fb30011b3ab5173cef96f1d1ce126da051792 <13ab9adef3cd386511c930a9660ae06595007f89; version=493fb30011b3ab5173cef96f1d1ce126da051792 <23431998a37764c464737b855c71a81d50992e98; version=493fb30011b3ab5173cef96f1d1ce126da051792 <6e4016c0dca53afc71e3b99e24252b63417395df; version=493fb30011b3ab5173cef96f1d1ce126da051792 <915470e1b44e71d1dd07ee067276f003c3521ee3; version=493fb30011b3ab5173cef96f1d1ce126da051792 <a30afd6617c30aaa338d1dbcb1e34e7a1890085c; version=493fb30011b3ab5173cef96f1d1ce126da051792 <b905b2acb3a0bbb08ad9be9984d8cdabdf827315; version=493fb30011b3ab5173cef96f1d1ce126da051792 <b9721a023df38cf44a88f2739b4cf51efd051f85; version=493fb30011b3ab5173cef96f1d1ce126da051792 <c62580674ce5feb1be4f90b5873ff3ce50e0a1db

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.4Oracle LinuxCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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